Human Body
Exploring "Why" questions about Human Body
481 articles
Why does travel in a bus/train make me feel tired?
I believe it's from the constant adjustments your body has to make from being bumped around. You never get the opportunity to sit still like you would on a couch.
Why do we sneeze sometimes as a response to pain?
The nerves in your face are very close together and sometimes a signal on one can cause an adjacent one to fire. Same reason some people sneeze in bright light.
why do so many lottery winners go broke within a year?
Fifty percent of lottery tickets are bought by the lowest thirty percent income earners. When these types of people win, they often have no idea how to handle money, or that money can make money just
Why does bending material such as metal, plastic, i.e. eventually wear it down so much that it snaps off?
Bending stuff actually breaks the inside of the material, but hopefully not enough to break the surface. Some materials like metal and plastic are secretly buzzing and jiggling around on the inside, a
Why does the body need carbon dioxide?
CO2 plays a vital role in maintaining the acid-base balance of your blood. The more CO2 in your blood, the more acidic it is. When you hyperventilate, you expel much of the CO2 in your blood, making i
Why does being angry/annoyed for an extended period make your stomach hurt?
When you are angry or annoyed you are likely stressed, meaning you are producing the stress hormone (cortisol). Cortisol is released when the sympathetic nervous system (fight or flight) is activated.
Why do we need surround sound, when we only have 2 ears? Alternatively: how do I know a sound is coming from the front or back from me?
You seem to understand that the ears can localize sounds based on the slight delay it takes to get to the near ear and the far ear. In cases where there is no delay - something in front or behind you
Why aren’t Chinese people typically fat? We eat so much rice on a near daily basis.
The answer is extremely simple: a modest number of total calories per day. (Often combined with a decent amount of exercise through work, walking, and/or cycling.) No matter what *kind* of food you ea
Why were most cities in the world founded over a century ago, except for a few planned exceptions? You don’t really see new cities appear anymore…
You have new cities appearing,but they aren’t famous now so you don’t know about them yet. Like China for example makes a lot of planned cities
Why is my eyesight blurry when I first wake up in the morning?
Most likely they're very dry. Blinking a few times and creating tears should clear it up, if not, then artificial tears/saline should do the trick.